.page-about {
  padding-bottom: 80px;
  overflow-wrap: break-word;
}

.page-about .breadcrumbs {
  margin: 8px 0 28px;
}

/* ---------- 开场 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 34px;
  align-items: start;
  margin-top: 4px;
}

.page-about .about-hero__text,
.page-about .about-hero__figure {
  min-width: 0;
}

.page-about .about-hero__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
  margin: 0 0 20px;
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 6.2vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 0 0 24px;
}

.page-about .about-hero__lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--paper);
  margin: 0;
  max-width: 58ch;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  list-style: none;
  margin: 32px 0 0;
  padding: 22px 0 0;
  border-top: 1px dashed var(--blue-line);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-hero__cap {
  font-size: 13px;
  color: var(--tin);
}

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-hero__frame {
  position: relative;
  border: 3px solid var(--blue-line);
  background: var(--ink-panel);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.34;
  background-image:
    repeating-linear-gradient(to right, var(--blue-line) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(to bottom, var(--blue-line) 0 1px, transparent 1px 46px);
}

.page-about .about-hero__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 1400;
  object-fit: cover;
}

.page-about .about-hero__caption {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--cinnabar-light);
  font-size: 13px;
  line-height: 1.7;
  color: var(--tin);
}

/* ---------- 通用标题 ---------- */
.page-about .about-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin: 0 0 14px;
}

.page-about .about-h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.55rem, 3.6vw, 2.2rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: 0 0 20px;
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: 26px;
  margin-top: 68px;
  padding-top: 34px;
  border-top: 3px solid var(--blue-line);
}

.page-about .about-origin__body { min-width: 0; }

.page-about .about-origin__body p {
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--paper);
  margin: 0 0 18px;
  max-width: 64ch;
}

.page-about .about-origin__body p:last-child { margin-bottom: 0; }

.page-about .about-origin__stamp {
  align-self: end;
  margin: 0;
  padding: 4px 0 4px 16px;
  border-left: 3px solid var(--amber);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 2;
  letter-spacing: 0.08em;
  color: var(--tin);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin-top: 76px;
}

.page-about .about-team__lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--tin);
  margin: 0;
  max-width: 66ch;
}

.page-about .team-grid {
  display: grid;
  gap: 22px;
  margin-top: 34px;
}

.page-about .team-card {
  position: relative;
  padding: 34px 22px 26px;
  background: var(--paper);
  color: var(--ink);
  border: 3px solid var(--blue-line);
  box-shadow: var(--shadow-hard);
  transition: transform 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 12px 0 0 #050F19;
}

.page-about .team-card:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-about .team-card__bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  display: block;
}

.page-about .team-card__bar--amber { background: var(--amber); }
.page-about .team-card__bar--cinnabar { background: var(--cinnabar); }

.page-about .team-card__count {
  font-family: var(--font-mono);
  font-size: 46px;
  font-weight: 700;
  line-height: 1;
  color: var(--cinnabar);
  margin: 0 0 8px;
}

.page-about .team-card__role {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-about .team-card__text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--blue-line);
  margin: 0;
}

.page-about .team-card__handoff {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--paper-edge);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--cinnabar);
}

/* ---------- 时间轴 ---------- */
.page-about .about-history {
  margin-top: 80px;
  padding-top: 34px;
  border-top: 3px solid var(--blue-line);
}

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 40px 0 0;
  padding: 0 0 0 40px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 26px;
  width: 3px;
  background: var(--blue-line);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: 38px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -38px;
  top: 5px;
  width: 14px;
  height: 14px;
  background: var(--amber);
  box-shadow: 0 0 0 4px var(--ink);
  transition: transform 200ms var(--ease), background 160ms var(--ease);
}

.page-about .timeline__item:hover::before,
.page-about .timeline__item:focus-within::before {
  background: var(--amber-bright);
  transform: scale(1.18) rotate(45deg);
}

.page-about .timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
  margin-bottom: 8px;
}

.page-about .timeline__body {
  max-width: 74ch;
}

.page-about .timeline__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.08rem;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .timeline__body p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--tin);
  margin: 0;
}

.page-about .timeline__media {
  margin: 0;
  border: 3px solid var(--blue-line);
  background: var(--ink-panel);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .timeline__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .timeline__media figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--blue-line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--tin);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  margin-top: 80px;
  padding: 36px 20px 32px;
  background: var(--ink-panel);
  border: 3px solid var(--blue-line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-flow__lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--tin);
  margin: 0;
  max-width: 66ch;
}

.page-about .flow {
  position: relative;
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.page-about .flow__step {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-about .flow__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--amber);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
}

.page-about .flow__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .flow__text {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--tin);
  margin: 0 0 14px;
}

.page-about .flow__detail {
  border-top: 1px dashed var(--blue-line);
  padding-top: 12px;
}

.page-about .flow__detail summary {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--amber);
}

.page-about .flow__detail summary::-webkit-details-marker { display: none; }

.page-about .flow__detail summary::before {
  content: "+";
  font-size: 15px;
  line-height: 1;
  color: var(--amber);
}

.page-about .flow__detail[open] summary::before { content: "−"; }

.page-about .flow__detail summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-about .flow__detail p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .about-flow__figure {
  margin: 34px 0 0;
  border: 3px solid var(--blue-line);
  background: var(--ink);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-flow__figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--blue-line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--tin);
}

/* ---------- 服务范围 ---------- */
.page-about .about-coverage {
  margin-top: 80px;
  padding-top: 34px;
  border-top: 3px solid var(--blue-line);
}

.page-about .coverage-stats {
  display: grid;
  gap: 20px;
  margin: 30px 0 34px;
}

.page-about .coverage-stat {
  min-width: 0;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--amber);
}

.page-about .coverage-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  color: var(--amber-bright);
}

.page-about .coverage-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--tin);
}

.page-about .scene-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .scene-item {
  min-width: 0;
  padding: 22px 20px;
  background: var(--ink-panel);
  border: 2px solid var(--blue-line);
}

.page-about .scene-item__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .scene-item__text {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--tin);
  margin: 0;
}

/* ---------- 管理规范 ---------- */
.page-about .about-rules {
  margin-top: 80px;
  padding-top: 34px;
  border-top: 3px solid var(--blue-line);
}

.page-about .rules-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .rules-item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px dashed var(--blue-line);
}

.page-about .rules-item:first-child { border-top: 1px dashed var(--blue-line); }

.page-about .rules-item__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--amber);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.page-about .rules-item__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  color: var(--paper);
  margin: 0 0 6px;
}

.page-about .rules-item__text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--tin);
  margin: 0;
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  margin-top: 76px;
  padding: 30px 20px;
  background: var(--paper);
  color: var(--ink);
  border: 3px solid var(--blue-line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-next__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 12px;
}

.page-about .about-next__text {
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--blue-line);
  margin: 0 0 24px;
  max-width: 64ch;
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin: 0;
  padding-top: 16px;
  border-top: 1px dashed var(--paper-edge);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-flow { padding: 40px 28px 36px; }
  .page-about .about-next { padding: 34px 28px; }
  .page-about .coverage-stats { grid-template-columns: repeat(3, 1fr); }
  .page-about .scene-list { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 720px) {
  .page-about .timeline { padding-left: 96px; }
  .page-about .timeline::before { left: 64px; top: 10px; }
  .page-about .timeline__year {
    position: absolute;
    left: -96px;
    top: 2px;
    width: 52px;
    margin-bottom: 0;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.14em;
  }
  .page-about .timeline__item--media { padding-bottom: 42px; }
}

@media (min-width: 780px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
    gap: 26px;
  }
  .page-about .team-card:nth-child(2) { margin-top: 24px; }
  .page-about .team-card:nth-child(3) { margin-top: 48px; }
}

@media (min-width: 860px) {
  .page-about .about-flow { padding: 44px 40px 40px; }
  .page-about .flow {
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
    padding-top: 10px;
  }
  .page-about .flow::before {
    content: "";
    position: absolute;
    top: 30px;
    left: 14px;
    right: 14px;
    border-top: 2px dashed var(--blue-line);
    z-index: 0;
  }
  .page-about .about-flow__figure {
    max-width: 520px;
    margin-left: auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 7fr 5fr;
    gap: 52px;
  }
  .page-about .about-origin {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
  }
}